CT扫描和选区激光烧结技术在颌骨修复中的应用

Construction of three dimensional finite element model of skull maxilla and dentition

目的:探讨根据不同的患者,不同的设计方案,生成个性化的缺损模型、修复体模型,建立颅骨上颌骨及牙列三维仿真,为上颌骨的修复提供标准数学模型和实体模型。方法:选择一具颅骨标本作为建模素材,通过螺旋CT扫描技术及三维影像技术完成初步重建,建立上颌骨及牙列的三维有限元模型,在此基础上运用快速原形技术得到修复体进行颌面修复。结果:获得了形态细致逼真的上颌骨及牙列三维重建生物力学模型和修复体,修复后形态与功能得以很好重建。结论:综合运用CT扫描、三维建模、快速成型等技术可以获得不同个体的上颌骨及牙列三维仿真模型和逼真的修复体,为临床探索上颌骨及牙列的修复设计了一套完整思路。

Objective： Based on distinct patients and different design project,individual harmed model and restoration model can be built. And according to the 3D simulation of maxilla, skull and dentition, standard mathematical model and entity model for maxilla repair can be provided. Methods： On the basis of scaned skull image, CT image reconstruction technique and 3 - D FEM were used, and the maxillofacial repair by restoration with rapid prototyping production technique. Results：A good 3D FE model of normal maxillary and dentition and restoration were constructed. And configuration and function of maxillofacial were rebuilt after repair. Conclusion：3D FE model of normal maxillary and dentition and restoration by CT image reconstruction, 3D FEM and rapid prototyping production technique can be achieved with pleasing in appearance on patients, low cost and less post - operative complications. And a complete idea for maxilla and dentition repair can be achieved.